Fire detector base with bluetooth positioning function

Abstract

This utility model discloses a fire detector base with Bluetooth positioning function. The internal circuit board of the fire detector base includes a rectifier bridge, a power chip, a Bluetooth chip, and an LED indicator. The circuit board is connected to the fire alarm bus via terminals. The bus is connected to the power chip LMR51603 via the rectifier bridge. The power chip LMR51603 converts the bus power to 3.3V. The 3.3V power output pin of LMR51603 is connected to the Bluetooth chip nRF52805 and the LED indicator. The Bluetooth chip nRF52805 is connected to the LED indicator via pins, to a crystal via pins, and to an antenna via pins. By setting up the base shell and the base circuit board, the base shell can fix the fire detector, provide a power interface for the detector, and utilize the extremely low power Bluetooth inside the base shell to achieve precise positioning of people taking refuge in the fire scene and firefighters entering the house to fight the fire, thereby providing assistance for fire fighting operations.

Description

Technical Field

[0001] This utility model relates to the field of fire detector technology, specifically a fire detector base with Bluetooth positioning function. Background Technology

[0002] On April 29, 2024, the State issued the GB17945—2024 standard "Fire Emergency Lighting and Evacuation Guidance System", which made new provisions for emergency fire protection and required that emergency fire indicator lights can locate and report indoor personnel.

[0003] However, emergency fire indicator lights are generally installed in the corridors of buildings, covering a relatively small area, while fire detectors are deployed more densely and are also installed in rooms. Fixing fire detectors also requires corresponding bases, but the bases in the existing technology do not have personnel positioning functions.

[0004] Since Bluetooth Low Energy (BLE) is a mature technology and the lowest power radio frequency technology used for positioning, designing a fire detector base with Bluetooth positioning functionality is a reasonable solution for personnel positioning in emergency firefighting scenarios. The fire protection system can be upgraded simply by replacing the base, enabling the location of personnel within the fire scene. Utility Model Content

[0005] The purpose of this invention is to provide a fire detector base with Bluetooth positioning function to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fire detector base with Bluetooth positioning function, comprising a base shell and a base circuit board. The base circuit board is fixedly installed inside the base shell. The base circuit board includes a rectifier bridge, a power chip, a Bluetooth chip, and an LED indicator. The base circuit board is connected to a fire alarm bus via terminals. The fire alarm bus is connected to a power chip LMR51603 via a rectifier bridge. The power chip LMR51603 converts the 16V bus power to 3.3V. The 3.3V power output pin of the power chip LMR51603 is connected to the Bluetooth chip nRF52805 to power the Bluetooth chip. The 3.3V power output pin of the power chip LMR51603 is connected to the LED indicator to power the LED indicator. The Bluetooth chip nRF52805 is connected to the LED indicator via pins to indicate the device's operating status. The Bluetooth chip nRF52805 is connected to a crystal via pins and to an antenna via pins.

[0007] Preferably, the fire protection bus not only powers the fire detector, but also powers the base circuit board inside the base housing. The power chip LMR51603 converts the 16V bus power to 3.3V and powers the Bluetooth chip nRF52805 and the LED indicator.

[0008] Preferably, the Bluetooth circuit uses 32M and 32.768K crystals, and the pins of the crystals are connected to matching capacitors respectively.

[0009] Preferably, the pins of the Bluetooth chip nRF52805 are connected to the antenna after passing through a filter capacitor and a filter inductor.

[0010] Preferably, the input and output terminals of the power supply pins on the circuit board are filtered out for noise by capacitors.

[0011] Beneficial effects This utility model provides a fire detector base with Bluetooth positioning function, which has the following advantages: This fire detector base with Bluetooth positioning function, through the setting of a base shell and a base circuit board, can fix the fire detector in place, provide a power interface for the detector, and can also use the extremely low power Bluetooth inside the base shell to achieve precise positioning of people taking refuge in the fire scene and firefighters entering the house to fight the fire, thereby providing assistance for fire fighting work. Attached Figure Description

[0012] Figure 1 This is a block diagram of the overall structure of the fire detector base of this utility model; Figure 2 This is the circuit diagram for the fire protection two-wire power supply access of this utility model; Figure 3 This is a power conversion circuit diagram of the present invention; Figure 4 This is a circuit diagram of the Bluetooth radio frequency and crystal oscillator of this utility model. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0015] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0016] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0017] Please see Figure 1-4 This utility model provides a technical solution: a fire detector base with Bluetooth positioning function, including a base shell and a base circuit board. The fire detector is detachably and fixedly installed on the surface of the base shell, and the base circuit board is fixedly installed inside the base shell. The base circuit board includes a rectifier bridge, a power chip, a Bluetooth chip, and an LED indicator. The base circuit board is connected to the fire protection bus via terminals. The fire protection bus is connected to the power chip LMR51603 via the rectifier bridge. The power chip LMR51603 converts the 16V bus power to 3.3V. The 3.3V power output pin of the power chip LMR51603 is connected to the Bluetooth chip nRF52805 to power the Bluetooth chip. The 3.3V power output pin of the power chip LMR51603 is connected to the LED indicator to power the LED indicator. The Bluetooth chip nRF52805 is connected to the LED indicator via pins to indicate the device's working status. The Bluetooth chip nRF52805 is connected to the crystal via pins and to the antenna via pins.

[0018] The fire protection bus not only powers the fire detectors but also the base circuit board inside the base housing. The power chip LMR51603 converts the 16V bus power to 3.3V and powers the Bluetooth chip nRF52805 and LED indicators.

[0019] The Bluetooth circuit uses 32M and 32.768K crystals, and the pins of the crystals are connected to matching capacitors respectively.

[0020] The Bluetooth chip nRF52805 pins are connected to the antenna after passing through a filter capacitor and a filter inductor.

[0021] The input and output terminals of the power supply pins on the circuit board are filtered out for noise by capacitors.

[0022] Further, see Figure 2 The external fire alarm two-wire bus is connected to the circuit board via terminals. It then passes through a 12R current-limiting resistor connected in series with the circuit, and connects to pins 1 and 2 of the rectifier bridge. Pins 3 and 4 of the rectifier bridge are the positive and negative terminals of the rectified power supply, respectively. This ensures that the two wires of the bus can supply power to the device regardless of whether they are connected in the correct orientation, achieving a non-polarity power supply. An input capacitor filters out noise between pins 3 and 4 of the rectifier bridge, and a Zener diode is connected to limit the voltage within a safe range, preventing damage to downstream circuit components due to excessive voltage.

[0023] See Figure 2 and Figure 3 The LMR51603 power chip's VIN and EN pins are connected to pin 3 of the rectifier bridge, which is the positive terminal of the rectified power supply. The LMR51603 power chip's GND pin is connected to pin 4 of the rectifier bridge, which is the negative terminal of the rectified power supply. Multiple capacitors are connected between the LMR51603 power input pins VIN and GND for filtering and stabilizing the operating voltage. The LMR51603 power chip's CB pin is connected to the first terminal of capacitor C16. The second terminal of capacitor C16 is connected to the LMR51603 power chip's SW pin and the first terminal of power inductor L3. The second terminal of inductor L3 is connected to the first terminal of feedback resistor R3. The second terminal of resistor R3 is connected to the LMR51603 power chip's FB pin and the first terminal of feedback resistor R4. The second terminal of R4 is connected to ground (GND). The output voltage is adjusted to 3.3V by setting the resistance values ​​of feedback resistors R3 and R4, and an output capacitor is connected at the output voltage to filter out ripple, providing a 3.3V operating voltage for the Bluetooth chip nRF52805 and the LED indicator.

[0024] See Figure 4The Bluetooth chip nRF52805 is connected to a 32.768K crystal via pins P0.00 / XL1 and P0.01 / XL2, and to a 32M crystal via pins XC1 and XC2. Each pin of the two crystals is connected to a matching capacitor to ensure stable operation of the crystals and provide a precise operating frequency for the Bluetooth chip.

[0025] Further, see Figure 4 The Bluetooth chip nRF52805 connects to the first terminal of inductor L1 via pin ANT. The second terminal of inductor L1 is connected to the first terminal of inductor L2 and the first terminal of capacitor C3. The second terminal of inductor L2 is connected to the antenna, and the second terminal of capacitor C3 is grounded. Inductors L1, L2, and capacitor C3 form an impedance matching network, matching the output impedance of the antenna circuit to the standard 50Ω, reducing Bluetooth signal reflection and improving transmission efficiency.

[0026] Furthermore, the Bluetooth chip nRF52805 is connected to and controlled by an LED indicator via pin P0.18 to indicate the device's operating status.

[0027] This utility model is a fire detector base with Bluetooth positioning function. It can fix the fire detector, provide a power interface for the detector, and use the extremely low power Bluetooth inside the base shell to achieve precise positioning of people taking refuge in the fire scene and firefighters entering the house to fight the fire, thereby providing assistance for fire fighting work.

[0028] The working principle of this utility model is as follows: An internal rectifier bridge enables non-polarity access to the fire protection dual-bus power supply. The rectified bus power supply is reduced to the required operating voltage of the Bluetooth chip by an internal power chip. The Bluetooth chip periodically broadcasts its ID and indicates its working status via LED indicators. Mobile devices entering the positioning area receive Bluetooth broadcast information and upload the received data to a cloud server. The server database contains preset maps and Bluetooth module binding information. The collected data is processed by a positioning algorithm to calculate the floor and coordinates of the mobile device, which are then displayed on the server map platform and the mobile device, thus achieving personnel positioning.

[0029] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fire detector base with Bluetooth positioning function, comprising a base housing and a base circuit board, wherein the base circuit board is fixedly installed inside the base housing, characterized in that: The base circuit board includes a rectifier bridge, a power chip, a Bluetooth chip, and an LED indicator. The base circuit board is connected to the fire alarm bus via terminals. The fire alarm bus is connected to the LMR51603 power chip via the rectifier bridge. The LMR51603 converts the 16V bus power to 3.3V. The 3.3V power output pin of the LMR51603 is connected to the nRF52805 Bluetooth chip to power the Bluetooth chip. The 3.3V power output pin of the LMR51603 is also connected to the LED indicator to power it. The nRF52805 Bluetooth chip is connected to the LED indicator via pins to indicate the device's operating status. The nRF52805 Bluetooth chip is also connected to a crystal and an antenna via pins.

2. The fire detector base with Bluetooth positioning function according to claim 1, characterized in that: The fire protection bus not only powers the fire detector, but also the base circuit board inside the base housing. The power chip LMR51603 converts the 16V bus power to 3.3V and powers the Bluetooth chip nRF52805 and the LED indicator.

3. A fire detector base with Bluetooth positioning function according to claim 1, characterized in that: The Bluetooth circuit of the base circuit board uses 32M and 32.768K crystals, and the pins of the crystals are connected to matching capacitors respectively.

4. A fire detector base with Bluetooth positioning function according to claim 1 or 2, characterized in that: The Bluetooth chip nRF52805 pins are connected to the antenna after passing through a filter capacitor and a filter inductor.

5. A fire detector base with Bluetooth positioning function according to claim 1, characterized in that: The input and output terminals of the power supply pins on the circuit board are filtered out by capacitors to remove noise.

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